#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
	int n = 0;
	int i = 0;
	int j = 0;
	while (scanf("%d", &n) != EOF)
	{

		for (i = 0;i < n;i++)
		{
			for (j = 0;j < n;j++)
			{
				if (i == 0 || i == n - 1)
				{
					printf("* ");
				}
				else if (j == 0 || j == n - 1)
				{
					printf("* ");

				}
				else
				{
					printf("  ");
				}

			}
			printf("\n");
		}

	}


	



	return 0;
}